Exploited

CVE-2025-2747

Kentico Xperience · CMS, e-commerce and websites

Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel Vulnerability

At a glance

Exploited. Added to CISA’s catalog of exploited vulnerabilities on October 20, 2025.

Affected product: Kentico Xperience (category CMS, e-commerce and websites, indicative classification). Name in CISA’s catalog: Kentico Xperience CMS.

What should I do?

Apply the patches or mitigations from Kentico; if none are available, stop using the product. For cloud services, follow the guidance from Kentico.

Deadline set by CISA for US federal agencies: 21 days (due November 10, 2025). It only binds those agencies, but it is a useful measure of urgency.

Kentico security advisories page (general page, not the advisory for this vulnerability)
The vendor’s specific advisory is listed in the NVD references: CVE-2025-2747 on the NVD website.

Original text of the required action (CISA)

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Timeline

March 24, 2025 Vulnerability published Publication date (NVD)
October 20, 2025 Exploitation confirmed Added to CISA’s KEV catalog
November 10, 2025 CISA deadline Remediation deadline set for US federal agencies

The facts, with their sources

Exploitation confirmed: Yes, on October 20, 2025 Date added to the catalog of exploited vulnerabilities. Exploitation itself may have started earlier. Source: KEV catalog, collected September 29, 2026 at 14:57 UTC
Ransomware: No known use to date That does not guarantee it is not being used: the information is not public. Source: KEV catalog, collected September 29, 2026 at 14:57 UTC
Hunt for compromise: Not requested by CISA Source: KEV catalog, collected September 29, 2026 at 14:57 UTC
CISA required action: Apply the patches or mitigations from Kentico; if none are available, stop using the product. For cloud services, follow the guidance from Kentico. Rewritten by this site from CISA’s original text. Source: KEV catalog, collected September 29, 2026 at 14:57 UTC
CISA deadline: November 10, 2025, 21 days Set for US federal agencies: a measure of urgency, not an obligation elsewhere. Source: KEV catalog, collected September 29, 2026 at 14:57 UTC
Vulnerability published: March 24, 2025 Source: National Vulnerability Database (NVD), collected September 29, 2026 at 15:00 UTC
Product according to CISA: Kentico Xperience CMS Filed by this site under “CMS, e-commerce and websites” (indicative classification). Source: KEV catalog, collected September 29, 2026 at 14:57 UTC
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Technical detail of the score: attack vector, complexity, impact. Source: National Vulnerability Database (NVD), collected September 29, 2026 at 15:00 UTC

Severity and activity

9.8 / 10 CVSS severity: critical

Score from the vendor or CISA, relayed by the NVD. Collected Sep 29, 2026.

— Probability of exploitation in the next 30 days (EPSS)

FIRST’s EPSS model. Since exploitation is already confirmed, this figure is mostly useful to compare activity. Collected Sep 29, 2026.

Description

An authentication bypass vulnerability in Kentico Xperience allows authentication bypass via the Staging Sync Server component password handling for the server defined None type. Authentication bypass allows an attacker to control administrative objects.This issue affects Xperience through 13.0.178.

Kentico Xperience CMS contains an authentication bypass using an alternate path or channel vulnerability that could allow an attacker to control administrative objects.

Summary from CISA (KEV catalog).

CERT-FR advisories

No advisory among the latest CERT-FR publications this site follows. That does not mean there are none.

Information reused under the Open Licence 2.0 (Etalab); the date of last update is shown for each advisory. This site is neither affiliated with nor endorsed by ANSSI.

Sources for this page

CISA KEV catalog: exploitation, date added, required action, deadline, ransomware.
NVD (NIST): CVSS severity, publication date, description, vendor references.
EPSS (FIRST): probability of exploitation.
CERT-FR: advisories and alerts (in French).
Brand and category: indicative classification by this site (method).